1, 1/1, 2 Isomerisation in Lewis base adducts of B2cat2. Issue 16 (24th March 2015) - Cade, I. A.
Abstract : The unexpected 1, 1/1, 2 isomerisation of the diolate in B2 cat2 is observed on addition of Lewis bases. Abstract : Reaction of bis-catecholatodiborane and 1 or 2 equivalents of 1, 5-diazabicyclo[4.3.0]non-5-ene or 4-picoline yields Lewis acid–base adducts. Recrystallisation enabled identification of an unexpected isomerisation from the 1, 1-isomer to the 1, 2-isomer. This observation was probed computationally with significantly different dipole moments calculated for the two effectively isoenergetic isomeric forms.